Extinguisher



Jan. 25, 1938.

J. HUMBLET EXTINGUISHER ve/v Ta R Patented Jan. 25, 1938 PATENT} OFFICE EXTINGUISHER.

joseph Humblet, Application March 2? Brussels, Belgium 1934, Serial N0. 717106 In Belgium and France March 27, 1933 4 Claims.

The invention relates to extinguishers and concerns particularly the extinguishers of the type in which an extinguishing substance under pressure, and specially carbon dioxide is used as extinguishing medium.

The extinguishers in which the outflow of the f extinguishing medium is obtained by percuting a diaphragm or like thin plate member are known, and it has'also been proposed to provide the extinguishers of the type comprising an extin- L with a disguishing substance under pressure tributing pipe or hose, but in the proposed constructions the percuting operation is not always efiected in a safe and reliable manner and-on the other hand the operator has to make use of both hands in performing the operations of either starting or stopping the projection.

An object of the invention is to overcome these drawbacks.

The invention mainly consists in arranging the percuting device to promote its efliciency and reliability in operation by suitably retaining the cut out portion of the diaphragm or plate member while the pressure of the extinguishing substance to be projected assists the release of the percuting member.

The invention further consists in the combina tion with the extinguishing apparatus of the kind aforesaid, of a valve like member mounted on the projecting pipe or hose, the arrangement being such that the operation of the extinguisher and the projection may be accomplished through the operator by means of one and the same hand, while the other hand may be used to. perform other useful operations as for example the transportation of the apparatus.

A form of construction of an extinguishing apparatus in accordance with the invention will be now described, by way of example, with reference to the accompanying drawing, in which:

Fig. 1 shows in side elevation, the extinguisher and its projecting device.

Fig. 2 is a central sectional view of the percuting device' Fig. 3 is a similar struction of the percuting device.

Referring to Fig. 1, there is shown'at I a container, filled with the extinguishing substance under pressure, for example carbon dioxide, and 2 indicates the distributing pipe'or hose, connected to the body 4 of the diaphragm arrangement 5.

In order to insure the projection of the extinguishing' substance, the diaphragm 5 is perview of analternativeconcuted by means of a plunger 6 retained in its upper position by the spring I.

As will be seen from Fig. 2, the plunger 6 is formed'with a part tubular member, bevelled at 8 and provided with an inner circular shoulder 9. Preferably a corresponding shoulder is also formed on the outer surface of the plunger.

The purpose of the inner shoulder 9 is to retain the'cut out portion of the diaphragm 5 when the latter is percuted, to avoid any possibility of this portion interfering with the flow of the extinguishi'ng substance while formingv a piston like member on which acts the inner pressure to cause the plunger 6 to be quickly returned to its upper or normal position.

In this position, the outer or external shoulder corresponding to the shoulder 9' presses against the packing l arranged'around the forming a tight seal during the projection.

.In Fig, 3 the plunger 6 is likewise formed in theshape of a cylindrical member, having a reduced lower portion the end of which is provided with a number of projections or cutting teeth 8.

At this end also the plunger is bored out a certain distance, the diameter of the bore decreasing comparatively rapidly so as to retain the cut out portion of the diaphragm or plate like 'member at a short distance from the end of the plunger and thus forming a piston like member return the plunger to its upper or normal position. v At the locationof its enlargement, the plunger is provided with an annular shoulder 9 on which is arranged. a packing washer l0.

The plunger portionof larger diameter passes through the opening 6 of a cover 4 serving as a guide therefor and a return spring I is arranged between the top of the cover 4 and screwed on the end of the plunger.

If desired the inner face of the cover 4 on which bears the washer l0, may be provided with concentric or other ribs. a To enable the operator to start and to stop the projection by means of the hand which directs the hose 2 towards the fire, a check or plunger.

tion, not shown, may be connected to the outer end of the valve device.

a knob 1 plunger, thus on which the inner pressure may act to quickly 1 The operation is as follows:

When it is desirable to project the extinguishing substance, for example upon a fire, the operator grips the hose by means of the handle I5 of the valve device and by means of the other hand causes the diaphragm 5 to be percuted by lowering the plunger Under such circumstances the cut out portion.

of the diaphragm enters the bore at the working end of the plunger and in the constructional example illustrated in Fig.2 engages the shoulder 9 of said bore. The inner pressure acting on the area of the cut 'out portion drives back the plunger 6, in the same direction as the force of the spring I.

The extinguishing substance then fills the pipe or hose 2 and becomesa'vailable at the distributing nozzle (not shown) upon actuation of thevalve device l2.

To cause the extinguishing substance to be projected, the operator then presses down thehand lever i3, moving the latter towards the handle l5 by means of the hand whichdirects the projection hose.

Consequently the other hand is available to perform any useful operation such for example as the transportation of the extinguisher.

.It is to be understood that the constructional forms described and illustrated are merely examples and that modifications may be made therein within the limits of the invention.

Lclaim:

1. -An extinguisher filled up with an extinguishing substance under pressure and comprising a discharge head, said discharge head being provided with a discharge passage, a diaphragm, a movable percuting plunger like member, 'means for moving the plunger away from the diaphragmand at the opposite side of the discharge passage relative to the diaphragm, means in the form of cutting projections on said plunger to cut out a portion of said diaphragm, means within the plunger behind and near said projections to retain the cut out portion in a piston head like position whereby when the diaphragm is percuted the pressure of the extinguishing substance acts on said piston head to assist driving back the plunger like member with the cut out portion therein clear of the discharge passage and interference with the outflow of the extinguishi g substance isavoided.

2. An extinguisher filled up with an extinguishing substance under pressure and comprising a discharge head, said discharge head being provided with a diaphragm, amovable plunger like .5 member, a guide for ,the plunger, said guide loosely fitting said plunger, means for normally retaining the plunger in a retracted position, a discharge passage located between the diaphragm and the plunger when in said retracted position, means in the form of cutting projections on said plunger to cut out a portion of said diaphragm, means within the plunger behind said projections and near of its operative end to retain the cut out portion in a piston head like position, an external shoulder on the plunger, a seat on said guide and packing means cooperating with said shoulder and seat whereby when the diaphragm is per- "cuted the pressure of the extinguishing substance acts on said piston head to assist driving back the plunger like member with the diaphragm cut out portion therein clear of thedischarge passage and prevent any interference with the outflow of the extinguishing substance and the packing means are pressed between the shoulder and seat to insure fluid tightness around the plunger.

3. In an extinguisher filled with an extinguishing substance under pressure, a discharge head including a diaphragm and a discharge passage, a DBICl ltillg plunger and guide means for said plunger in said head at one side of said diaphragm, means for moving theplunger away from the diaphragm and a ring of toothed-shaped projections located at the inner end of the plunger for cutting out a portion of the 'diaphragm, said projections providing means for retaining the cut-out portion of said diaphragm on the plunger whereby such portion is carried with the plunger when said plunger is moved through said diaphragm and liberated therefrom.

4. In an extinguisher filled with an extinguish:

diaphragm, means in said head for longitudinally guiding the movement hi the plunger, an imperforate tubular end portion on said plunger and a.

plurality of pointed toothed-shaped projections distributed around the edge of said tubular end portion for cutting out a portion of the diaphragm, and means positioned near the end of said tubular end portion for retaining the cutout portion of said diaphragm within said tubular end, whereby a portion of-the diaphragm is cut P out and carried with the plunger when said plunger is movedthrough said diaphragm and retracte'd therefrom.

JOSEPH 

